- Author
-
Sant, G.
|
Dehadrai, M.
|
Bentz, D. P.
|
Lura, P.
|
Ferraris, C. F.
|
Bullard, J. W.
|
Weiss, J.
- Title
- Detecting the Fluid-to-Solid Transition in Cement Pastes.
- Coporate
- Purdue Univ., West Lafayette, IN
Tourney Consulting Group, Kalamazoo, MI
National Institute of Standards and Technology, Gaithersburg, MD
EMPA, Switzerland
- Journal
-
Concrete International,
Vol. 31,
No. 6,
53-58,
June 2009
- Keywords
-
cements
|
cement pastes
|
construction
|
time
|
stress (mechanics)
|
structures
|
calorimetry
|
rheology
|
shrinkage
- Identifiers
- techniques sensitive to volume change; techniques sensitive to stress resistance or development; techniques sensitive to structure development; relating structure development to degree of reaction; chemical shrinkage; autogeneous shrinkage; Vicat test; ultrasonic testing; CEMHYD3D; cementitious materials
- Abstract
- The time of set for concrete is extremely important when scheduling construction operations. The fluid-to-solid transition that occurs during setting is crucial in assessing practical construction operations, such as finishing, sawcutting, and curing, and determining when test procedures such as early-age shrinkage measurements should be initiated. The solidification of cementitious mixtures can be identified using a variety of techniques. Each of the investigated techniques indicates that solidification occurs after a similar time period and contributes to a more detailed understanding of the fluid-to-solid transition. The interpretation of the results of each technique are described from a fundamental viewpoint, along with additional insight into the behavior of concrete that the techniques help explain or illustrate. Details of the investigated test methods can be found in a companion paper available with the online version of this article at www.concreteintemational.com.